- Launch Xbox app
- Go to "Settings"
- Go to DVR and set it to "off"
- Close Xbox app
- Restart MWO
- Enjoy returned FPS
If you can't find it or have issues post back here. Again, this isn't a cure-all, but it helped me immensely and it resolved the same issue on my Wife's computer (same build as mine, 3770k @ 4.8 with 2 980's). I read that this was always an issue with the xbox app, but I only noticed it after this last patch, where the DVR features somehow got switched on.
Edited by Fierostetz, 17 November 2015 - 11:03 PM.